High-energy expansion of Coulomb corrections to the e+e- photoproduction cross section

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dc.creatorLee, R. N.
dc.creatorMilstein, A. I.
dc.creatorStrakhovenko, V. M.
dc.date2003-10-09
dc.date2004-05-13
dc.date.accessioned2026-07-07T12:37:57Z
dc.date.available2026-07-07T12:37:57Z
dc.descriptionFirst correction to the high-energy asymptotics of the total $e^+e^-$ photoproduction cross section in the electric field of a heavy atom is derived with the exact account of this field. The consideration is based on the use of the quasiclassical electron Green function in an external electric field. The next-to-leading correction to the cross section is discussed. The influence of screening on the Coulomb corrections is examined in the leading approximation. It turns out that the high-energy asymptotics of the corresponding correction is independent of the photon energy. In the region where both produced particles are relativistic, the corrections to the high-energy asymptotics of the electron (positron) spectrum are derived. Our results for the total cross section are in good agreement with experimental data for photon energies down to a few $MeV$. In addition, the corrections to the bremsstrahlung spectrum are obtained from the corresponding results for pair production.
dc.description22 pages, 7 figures, RevTeX.Typos are corrected. The numerical results, figures and conclusions remain unchanged as they were obtained using correct formulas
dc.identifierhttps://arxiv.org/abs/hep-ph/0310108
dc.identifierhttp://arxiv.org/abs/hep-ph/0310108
dc.identifierPhys.Rev.A69:022708,2004
dc.identifierdoi:10.1103/PhysRevA.69.022708
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/218589
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectAtomic Physics
dc.titleHigh-energy expansion of Coulomb corrections to the e+e- photoproduction cross section
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